ArticleGenetics2003
Delineation by fluorescence in situ hybridization of a single hemizygous chromosomal region associated with aposporous embryo sac formation in Pennisetum squamulatum and Cenchrus ciliaris.
Article in Genetics, 2003. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
31 citing papers in PubMed, 81 citations in OpenAlex.
- Mitotic karyotyping and FISH mapping of the gender-specific locus indicate an advanced XY system inJournal of genetics · 2026Article
- How Apomictic and Sexual Cenchrus Species Can Help Elucidate the Mechanisms Leading to Apospory.Methods in molecular biology (Clifton, N.J.) · 2026Article
- Apomixis: oh, what a tangled web we have!Planta · 2023Review
- Alien genome mobilization and fixation utilizing an apomixis mediated genome addition (AMGA) strategy in Pennisetum to improve domestication traits of P. squamulatum.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2022Article
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- Selection and validation of reference genes for gene expression analysis in apomictic and sexual Cenchrus ciliaris.BMC research notes · 2013Article
- Harnessing apomictic reproduction in grasses: what we have learned from Paspalum.Annals of botany · 2013Review
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- Preparations of meiotic pachytene chromosomes and extended DNA fibers from cotton suitable for fluorescence in situ hybridization.PloS one · 2012Article
- Evolution of the apomixis transmitting chromosome in Pennisetum.BMC evolutionary biology · 2011Article
- A molecular map of the apomixis-control locus in Paspalum procurrens and its comparative analysis with other species of Paspalum.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2011Article
- Identification of ovule transcripts from the Apospory-Specific Genomic Region (ASGR)-carrier chromosome.BMC genomics · 2011Article
- Sexual and apomictic plant reproduction in the genomics era: exploring the mechanisms potentially useful in crop plants.Sexual plant reproduction · 2010Review
- Phylogenetic studies favour the unification of Pennisetum, Cenchrus and Odontelytrum (Poaceae): a combined nuclear, plastid and morphological analysis, and nomenclatural combinations in Cenchrus.Annals of botany · 2010Article
- Genetic mapping of the apospory-specific genomic region in Pennisetum squamulatum using retrotransposon-based molecular markers.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2009Article
- Segregation distortion in Lolium: evidence for genetic effects.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2008Article
- Sequence analysis of bacterial artificial chromosome clones from the apospory-specific genomic region of Pennisetum and Cenchrus.Plant physiology · 2008Article
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- Diploid apomicts of the Boechera holboellii complex display large-scale chromosome substitutions and aberrant chromosomes.Proceedings of the National Academy of Sciences of the United States of America · 2007Article
Corrections and comments
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Authors and funding
6 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Apomixis is a means of asexual reproduction by which plants produce embryos without meiosis and fertilization; thus the embryo is of clonal, maternal origin. We previously reported molecular markers showing no recombination with the trait for aposporous embryo sac development in Pennisetum squamulatum and Cenchrus ciliaris, and the collective single-dose alleles defined an apospory-specific genomic region (ASGR). Fluorescence in situ hybridization (FISH) was used to confirm that the ASGR is a hemizygous genomic region and to determine its chromosomal position with respect to rDNA loci and centromere repeats. We also documented chromosome transmission from P. squamulatum in several backcrosses (BCs) with P. glaucum using genomic in situ hybridization (GISH). One to three complete P. squamulatum chromosomes were detected in BC(6), but only one of the three hybridized with the ASGR-linked markers. In P. squamulatum and in all BCs examined, the apospory-linked markers were located in the distal region of the short arm of a single chromosome. All alien chromosomes behaved as univalents during meiosis and segregated randomly in BC(3) and later BC generations, but presence of the ASGR-carrier chromosome alone was sufficient to confer apospory. FISH results support our hypotheses that hemizygosity, proximity to centromeric sequences, and chromosome structure may all play a role in low recombination in the ASGR.
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